<template>
	<view>
		<my-search @click="gotoSearch" bgcolor='#c00000' :radius="15" placeholder="默认的placeholder的值" />
		<view class="scroll-view-container">
			<scroll-view scroll-y class="left-scroll-view" :style="{ height: wh + 'px'}">
				<block v-for="(item,index) in cateList" :key="index">
					<view :class="['left-srcoll-view-item', index === active ? 'active' : '']"
						@click="activeChanged(index)">{{ item.cat_name }}</view>
				</block>
			</scroll-view>
			<!-- 右侧 -->
			<scroll-view scroll-y :scroll-top="scrollTop" class="right-scroll-view" :style="{ height:wh + 'px'}">
				<!-- 二级标题 -->
				<view class="cate-leve" v-for="(item, index) in cateLeve" :key="index">
					<view class="cate-leve-title">/{{ item.cat_name}}/</view>
					<!-- 三级列表 -->
					<view class="acte-leves-list">
						<view class="cate-leves-item" v-for="(items,indexs) in item.children" :key="indexs"
							@click="gotoGoodsList(items)">
							<!-- 图片 -->
							<image :src="items.cat_icon" mode=""></image>
							<!-- 文字 -->
							<text>{{items.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import bedgeMix from '@/mixins/tabbae-badge.js'
	
	export default {
		mixins: [bedgeMix],
		data() {
			return {
				// 窗口的可用高度=
				wh: 0,
				cateList: [], //一级分类的数据列表
				cateLeve: [], //二级分类的数据列表
				active: 0, //当前选中的激活项 默认第一个被选中
				scrollTop: 0,
			};
		},
		onLoad() {
			// 获取当前系统的信息
			const sysInfo = uni.getSystemInfoSync()
			// 当前可使用窗口的高度
			this.wh = sysInfo.windowHeight - 50
			this.getCateList()
		},
		methods: {
			async getCateList() {
				// 请求数据
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				console.log(res);
				if (res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				// 给二级列表赋值
				this.cateLeve = res.message[0].children
			},
			activeChanged(index) {
				this.active = index
				// 当点击的这个当前项发生变化的时候，为二级列表重新赋值
				this.cateLeve = this.cateList[index].children
				// 让scroll 的值再0和1之间切换
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			gotoGoodsList(item) {
				console.log(item);
				uni.navigateTo({
					url: `/subpkg/goods_list/goods_list?cid=${item.cat_id}`
				})
			},
			gotoSearch() {
				// 导航到这个页面

				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-srcoll-view-item {
				line-height: 60px;
				background-color: #F7F7F7;
				text-align: center;
				font-size: 12px;

				// 激活当前项的样式
				&.active {
					background-color: #ffffff;
					position: relative;

					// 当前激活项左侧的边框线
					&::before {
						content: ' ';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c00000;
						position: absolute;
						top: 50%;
						left: 0;
						transform: translateY(-50%);
					}
				}
			}
		}

		.cate-leve-title {
			font-size: 12px;
			font-weight: bold;
			text-align: center;
			padding: 15px;
		}

		.acte-leves-list {
			display: flex;
			flex-wrap: wrap;

			.cate-leves-item {
				width: 33.33%;
				margin-bottom: 10px;
				display: flex;
				flex-direction: column;
				align-items: center;

				image {
					width: 60px;
					height: 60px;
				}

				text {
					font-size: 12px;
				}
			}
		}
	}
</style>